Ok. UFC airs on Spike TV, WEC airs on VS and what you are talking about is Pride FC on Fox Sports Networks. The reason they pan out is because now that Zuffa owns Pride, they are systematically obscuring some of the techniques allowed in pride, ie: Foot Stomps, soccer kicks and the like. In addition, the FCC has certain regulation on what can be shown, especially when it's real. When ever the action gets too crazy, they pan and rejoin the fight when they can.

Ok. UFC airs on Spike TV, WEC airs on VS and what you are talking about is Pride FC on Fox Sports Networks. The reason they pan out is because now that Zuffa owns Pride, they are systematically obscuring some of the techniques allowed in pride, ie: Foot Stomps, soccer kicks and the like. In addition, the FCC has certain regulation on what can be shown, especially when it's real. When ever the action gets too crazy, they pan and rejoin the fight when they can.

Do you have a source for this? I recall seeing Shogun Rua use a devastating soccer kick in one of his fights.

There are some old re-runs that air with not much interuption and all the techniques shown. The newer episodes were prodecued with Zuffa's interests in mind, ie: Liddel-Rampage 1 before the UFC bout, Ramapge HL and Hendo HL. These and other Pride FC episodes were produced because there are still contractual obligations by FSN for commercial distribution, however they now answer to Zuffa, not Dreamworks Ent. They (Zuffa) still hasn't announced if it will continue to licence the Pride FC show. Also, since the product is theirs, they can at any time go back to showing the full fights (I highly doubt it).
As for documentation, I don't have anything concrete, but I work for Fox Television Stations in NYC.